The Polariscope and its Application to the Glass Industry
T256-T258 (3 pages)
The use of a polariscope for detecting strained areas in glass due mainly to faulty annealing is not by any means an innovation but is simply another case of a well-known scientific principle which has come to the fore as a direct result of the war. As far back as the middle of last century the use of such an instrument was suggested as a means whereby either the manufacturer or the housewife could tell the quality of glass articles of everyday use. In the following account a well-known type of polariscope is described, together with a few extra fittings which render it useful as a glass works instrument.
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